TY - JOUR T1 - Pendulum Clocks and Their Errors JF - Proceedings of the Royal Society of London. Series A, Containing Papers of a Mathematical and Physical Character (1905-1934) VL - 85 IS - 581 SP - 505 EP - 526 PY - 1911/10/18/ UR - http://dx.doi.org/10.1098/rspa.1911.0064 M3 - doi:10.1098/rspa.1911.0064 AU - Mallock, H. ER -